Long Distance Elementary Measurement of the Radiation Dose Ratio Produced by Neutron Activation

The working principle and the structure and performances of a long distance controllable individual radiation dose ratio instrument are described.The radiation dose ratio produced by neutron activation is elementarily measured by using this instrument in the neutron generator hall with high neutron yield.When neutron yield arrives to 2×1011 s-1,the radiation dose ratio produced by neutron activation is 99.9 μSv/h in 1 h after the generator being stopped.The radiation dose ratio is reduced to 24.4 μSv/h in 39 h after the generator being stopped.When neutron yield is 3.2×1010 s-1,the radiation dose ratio produced by neutron activation is 21.9 μSv/h in 36 min,after the generator being stopped.The measurement results may provide referrence for physical experimenters and neutron generator operators.